부하가 높습니다.
이게 내 상의야
top - 04:08:52 up 15 days, 15:14, 1 user, load average: 99.09, 107.09, 117.35
Tasks: 998 total, 125 running, 827 sleeping, 1 stopped, 45 zombie
Cpu(s): 13.4%us, 75.1%sy, 0.0%ni, 11.3%id, 0.0%wa, 0.0%hi, 0.2%si, 0.0%st
Mem: 65951648k total, 65390852k used, 560796k free, 5023756k buffers
Swap: 4194300k total, 262684k used, 3931616k free, 39846488k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
14904 nobody 20 0 151m 50m 2508 R 15.4 0.1 11:12.89 httpd
1769 root 20 0 0 0 0 R 15.1 0.0 355:06.40 kondemand/22
1778 root 20 0 0 0 0 S 14.8 0.0 345:52.47 kondemand/31
1767 root 20 0 0 0 0 S 14.4 0.0 353:41.57 kondemand/20
1766 root 20 0 0 0 0 S 13.8 0.0 374:52.13 kondemand/19
15188 newgames 20 0 0 0 0 Z 13.8 0.0 0:00.42 php <defunct>
1772 root 20 0 0 0 0 R 13.4 0.0 337:16.18 kondemand/25
1775 root 20 0 0 0 0 S 13.4 0.0 352:11.24 kondemand/28
11857 mailnull 20 0 71640 1408 752 S 12.8 0.0 0:39.47 exim
15180 hearsttr 20 0 179m 10m 6020 R 12.8 0.0 0:00.39 php
20980 nobody 20 0 151m 50m 2084 R 12.8 0.1 12:14.03 httpd
1755 root 20 0 0 0 0 S 12.5 0.0 364:43.87 kondemand/8
1764 root 20 0 0 0 0 R 12.5 0.0 342:25.04 kondemand/17
15161 hearsttr 20 0 0 0 0 Z 12.5 0.0 0:00.38 php <defunct>
1756 root 20 0 0 0 0 R 12.1 0.0 352:29.80 kondemand/9
1771 root 20 0 0 0 0 R 12.1 0.0 349:01.36 kondemand/24
15138 hearsttr 20 0 0 0 0 Z 12.1 0.0 0:00.37 php <defunct>
1757 root 20 0 0 0 0 S 11.8 0.0 368:19.92 kondemand/10
1773 root 20 0 0 0 0 S 11.8 0.0 355:11.04 kondemand/26
15174 newgames 20 0 0 0 0 Z 11.8 0.0 0:00.36 php <defunct>
15440 nobody 20 0 151m 50m 2080 R 11.8 0.1 10:13.40 httpd
1760 root 20 0 0 0 0 R 11.5 0.0 368:08.78 kondemand/13
1765 root 20 0 0 0 0 S 11.5 0.0 358:25.81 kondemand/18
15817 nobody 20 0 151m 50m 2112 R 11.5 0.1 12:15.94 httpd
15194 hearsttr 20 0 187m 12m 5820 S 11.1 0.0 0:00.34 php
15217 hearsttr 20 0 0 0 0 Z 10.8 0.0 0:00.33 php <defunct>
15226 newgames 20 0 0 0 0 Z 10.8 0.0 0:00.33 php <defunct>
1219 nobody 20 0 151m 50m 2084 R 10.5 0.1 2:26.14 httpd
1758 root 20 0 0 0 0 S 10.5 0.0 375:39.42 kondemand/11
1759 root 20 0 0 0 0 R 10.5 0.0 364:42.21 kondemand/12
1763 root 20 0 0 0 0 S 10.5 0.0 355:34.66 kondemand/16
1770 root 20 0 0 0 0 S 10.5 0.0 350:08.17 kondemand/23
6111 nobody 20 0 151m 50m 2508 R 10.5 0.1 9:23.07 httpd
14425 nobody 20 0 151m 50m 2208 S 10.5 0.1 11:37.53 httpd
15085 nobody 20 0 151m 50m 2508 R 10.5 0.1 11:11.37 httpd
15228 sexsmovi 20 0 188m 12m 5820 S 10.5 0.0 0:00.32 php
15378 nobody 20 0 151m 50m 2508 S 10.5 0.1 11:46.37 httpd
15522 nobody 20 0 151m 50m 2196 S 10.5 0.1 10:54.56 httpd
16446 nobody 20 0 151m 50m 2988 S 10.5 0.1 11:12.03 httpd
16962 nobody 20 0 151m 50m 2196 S 10.5 0.1 11:05.68 httpd
18266 nobody 20 0 151m 50m 2084 S 10.5 0.1 11:41.40 httpd
18334 nobody 20 0 151m 50m 2468 S 10.5 0.1 10:39.56 httpd
18774 nobody 20 0 151m 50m 2092 S 10.5 0.1 11:00.09 httpd
817 nobody 20 0 151m 51m 2992 S 10.2 0.1 10:09.30 httpd
1882 nobody 20 0 151m 50m 2844 S 10.2 0.1 11:40.74 httpd
14523 nobody 20 0 151m 50m 3000 S 10.2 0.1 11:30.28 httpd
14900 nobody 20 0 151m 50m 2080 S 10.2 0.1 10:38.68 httpd
14919 nobody 20 0 151m 50m 2540 S 10.2 0.1 11:33.35 httpd
15178 nobody 20 0 151m 50m 2508 S 10.2 0.1 11:35.48 httpd
15223 romanced 20 0 0 0 0 Z 10.2 0.0 0:00.31 php <defunct>
15251 nudeteen 20 0 184m 9.9m 5204 R 10.2 0.0 0:00.31 php
15259 investgr 20 0 184m 9884 5164 R 10.2 0.0 0:00.31 php
15460 nobody 20 0 151m 50m 2076 S 10.2 0.1 12:09.73 httpd
15944 nobody 20 0 151m 50m 2092 R 10.2 0.1 11:27.52 httpd
16168 nobody 20 0 151m 50m 2508 S 10.2 0.1 11:40.34 httpd
16736 nobody 20 0 151m 50m 2968 R 10.2 0.1 11:42.38 httpd
17367 nobody 20 0 151m 50m 2228 S 10.2 0.1 10:32.59 httpd
17438 nobody 20 0 151m 50m 2540 S 10.2 0.1 10:54.28 httpd
17882 nobody 20 0 151m 50m 2980 S 10.2 0.1 11:12.86 httpd
CPU의 75%는 사용자가 아닌 시스템에서 사용됩니다. 그들이 무엇을 하는지 궁금해요?
root@host [~]# iostat -xk 5
Linux 2.6.32-504.el6.x86_64 (host.buildingsuperteams.com) 01/14/2015 _x86_64_ (32 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
6.75 0.03 13.14 0.02 0.00 80.06
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util
sda 0.27 132.84 1.38 37.44 17.17 1371.08 71.52 0.42 10.77 0.69 2.67
sdb 0.05 38.16 0.51 29.32 12.26 273.27 19.14 0.19 6.32 0.32 0.94
iostat는 SSD의 과도한 사용을 보여주지 않습니다
iftop을 실행하면 네트에 병목 현상이 나타나지 않는 것 같습니다.
시스템에서 뭔가가 실행되고 있는데 뭐죠?
내 다른 서버에서는 일부 제안
새로운 PHP 액세스가 있을 때마다 새로운 프로세스가 열리므로 Apache 구성 방식으로 인해 서버 부하가 높습니다.
이 가상 호스트에 대해 Apache keepalive를 활성화했는데 부하가 낮아지는 것 같습니다.
자세한 내용은 어디서 배울 수 있는지 궁금합니다.
16코어 CPU에 대한 정보는 다음과 같습니다.
root@host [~]# grep -E '^model name|^cpu MHz' /proc/cpuinfo
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 1400.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000
model name : AMD Opteron(TM) Processor 6272
cpu MHz : 2100.000